Overview | Grand Central USB MIDI Controller in CircuitPython | Adafruit Learning System
Kickstarter Campaign For 32-Knob MIDI Controller
looking for a midi controller with with tons of knobs only? - Ableton Forum
Amazon.com: Donner MIDI Pad Beat Maker with 16 Beat Pads, 2 Assignable Fader & Knobs and Music Production Software Included, USB MIDI Pad Controller STARRYPAD with 40 Free Courses : Musical Instruments